What is negative pore water pressure in soil?
Thank you everyone.
Thank you everyone.
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What are the methods for ground improvement technique and which one is the best among them?
How can Artificial Intelligence be used in Geotechnical Engineering?
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This answer was edited.
Hi, Geotechnical engineering deals with materials (e.g., soil and rock) that, by their very nature, exhibit varied and behavior due to the physical processes associated with the formation of these materials. Modeling such materials' behavior is complicated and usually beyond the ability of most tradRead more
Hi,
Geotechnical engineering deals with materials (e.g., soil and rock) that, by their very nature, exhibit varied and behavior due to the physical processes associated with the formation of these materials. Modeling such materials’ behavior is complicated and usually beyond the ability of most traditional forms of physically-based engineering methods. Artificial intelligence (AI) is becoming more popular and particularly amenable to modeling most geotechnical engineering materials’ complex behavior because it has demonstrated superior predictive ability compared to traditional methods. Over the last decade, AI has been applied successfully to virtually every problem in geotechnical engineering. However, despite this success, AI techniques are still facing classical opposition due to some inherent reasons such as lack of transparency, knowledge extraction, and model uncertainty, which will discuss in detail in this chapter. Among the available AI, techniques are artificial neural networks (ANNs), genetic programming (GP), evolutionary polynomial regression (EPR), support vector machines, M5 model trees, and K-nearest neighbors (Elshorbagy et al.,2010). This chapter will focus on three AI techniques, including ANNs, GP, and EPR.
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What is adsorbed water, and how does it affect the permeability of soil?
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Adsorbed water The term 'Adsorbed water' as it applies to the area of reclamation can be defined as ' Water in a soil or rock mass, held by physico-chemical forces, having physical properties substantially different from absorbed water or chemically combined water, at the same temperature and pressuRead more
Adsorbed water
The term ‘Adsorbed water’ as it applies to the area of reclamation can be defined as ‘ Water in a soil or rock mass, held by physico-chemical forces, having physical properties substantially different from absorbed water or chemically combined water, at the same temperature and pressure’.
How affects the permeability :
Fine particles of clay are surrounded by films of adsorbed water. Forces of adsorption and development of diffuse ion-layer around the clay particles create immobilized hydrodynamic layers of water, thereby reducing the effective pore space available for seepage.
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Is it possible to obtain some data on factors on which seepage in dams depends?
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Absolutely Yes, factors of seepage are very important to determine before the construction of a dam or even after the construction of the dam for maintenance work. Electrical resistivity method is used to determine the amount of seepage and depth of seepage. As a civil engineer, it's our responsibilRead more
Absolutely Yes, factors of seepage are very important to determine before the construction of a dam or even after the construction of the dam for maintenance work.
Electrical resistivity method is used to determine the amount of seepage and depth of seepage.
As a civil engineer, it’s our responsibility to provide higher safety.
Seepage under the embankment is very much dangerous as compared to concrete dams because embankments are built on a very soft material which is easily scoured and it is very vulnerable for the influence of water.
On other side concrete dam, is built on hard strata and even the defective dam which not the endangered by passing of water from the underside.
Following are the methods for controlling seepage
- Providing drainage
- By reducing the seepage with some proper methods.
- Largely use of filters for preventing the piping and heave
As the consolidation process continues, water will be expelled out. Why is the degree of saturation of soil treated as constant throughout the consolidation process?
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The degree of saturation denotes the actual relationship between the weight of moisture existing in a space and the weight that would exist if the space were saturated. It can be also said as the percentage of water that occupies the pore spaces present in soil and is said to be degree of saturationRead more
The degree of saturation denotes the actual relationship between the weight of moisture existing in a space and the weight that would exist if the space were saturated.
It can be also said as the percentage of water that occupies the pore spaces present in soil and is said to be degree of saturation. Basically, the soil has three phases soil solid, water and air. If the pore and void space in the soil is fully occupied by water, then it is fully saturated and the degree of saturation is 100%. If the void space in the soil is partially occupied by water, then it is said to be partially saturated.
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What is the equation of A-line in the plasticity chart?
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Fine grained soils are classified based on the plasticity chart. The equation of A line is ; Ip=0.73(liquid limit -20) Ip=plasticity index
Fine grained soils are classified based on the plasticity chart. The equation of A line is ;
Ip=0.73(liquid limit -20)
Ip=plasticity index
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Komal Bhandakkar
AUTHOR
How can we differentiate clay and silt apart from its sizes?
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Here, from a geotechnical perspective you can’t differentiate silt and clay on the basis of grain size because it can be irrelevant to material behaviour. Silt and clay are both the result of the physical and chemical breakdown of the minerals in rocks. They main difference is in chemical compositioRead more
Here, from a geotechnical perspective you can’t differentiate silt and clay on the basis of grain size because it can be irrelevant to material behaviour.
Silt and clay are both the result of the physical and chemical breakdown of the minerals in rocks. They main difference is in chemical composition and particle size.
Silt is composed of silicate minerals, or those containing silicon and oxygen.
Clay is composed of metal silicates, or silicates with metals like magnesium or aluminum associated with it.
But in terms of handling the two as part of an experiment, the main discernible difference is particle size. Sand particles are larger than silt particles which are in turn larger than clay particles. Silt particles are about 0.05 to 0.002 millimeters in size. Clay particles are smaller than micrometer in size. So silt particles are too small to really be felt with your fingers like grains of sand. But wet silt will feel very smooth like finely ground baking flour. Clay particles are so small that they will simply feel sticky. You won’t be able to move them around your fingers like silt particles. This stickiness will be the main difference between the two in terms of touch.
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sanjaypakad
The pressure is zero when the soil voids are filled with air, and is negative when the voids are partly filled with water (in which case surface-tension forces operate to achieve a suction effect and the shear strength of the soil is increased).
The pressure is zero when the soil voids are filled with air, and is negative when the voids are partly filled with water (in which case surface-tension forces operate to achieve a suction effect and the shear strength of the soil is increased).
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